﻿Boston Marathon victims to be honored

Boston Police patrol an area near a bridge that overlooks the finish line of the Boston Marathon, Monday, April 14, 2014, in Boston. A year after twin pressure cooker bombs shattered the marathon and paralyzed the area for days, federal prosecutors say they have a trove of evidence ready to use against the surviving suspect, but many questions remain. (AP Photo/Steven Senne)

Volker Fischer, of Highland Park, had just crossed the finish line when the first bomb exploded behind him, sending dark smoke into the air on that fateful day in downtown Boston.